/diy/ - Do It Yourself

>>1637271
Man, I don't even know what to tell you. I've used about 5 different mowers in my entire life and still haven't even approached amassing the same number of issues between all of them that you're talking about.

My current mower is like 5 years old, and was one of the cheapest ones on the shelf. I beat the living hell out of it, and it still runs fine, even when I use year old gas in it, because I at least take care of it at the end of every season (sometimes even every other). The biggest issue I ever ran into with a mower was having to remove the spark plug and spray starter fluid into the cylinder to get it to go if it sat for a while.

What are you even doing to them?
Are you changing oil?
Are you using the right gas?
Have you ever cleaned/replaced an air filter?
How are you even storing these things?
Are you buying these things all used?

It seems like if you were having this many issues this fast on new mowers, SOMETHING would have to be under warranty, and maybe you could get some answers as to what is going wrong and what to avoid.

What you're talking about sounds like you're going to over-complicate a situation that is already not fully under your grasp, and you're going to lose a lot of money in the process.

Also, I wanted to let you know that your mower looks like a reject Constructicon. That is all.

>>1479175
USB D+ and D- can be pulled high or low from either end of the wire, and also have pull-ups and pull-downs on each end depending. there are real bus switch ICs that could (and probably should) be used, e.g. 74CBT3257. the USB 1.1 spec is very educational as to what OP is in for
also a break-before-make is required that lasts long enough for the host to recognize that the old device is gone and that it needs to configure a new device
finally some devices/hosts might get into unusable states if a device doesn't lose power and thus reset between connection cycles. disconnecting VBUS might be needed in that case
try a Hall effect switch?

>>1478829
>USB 3.0 without data loss
c ~= 300 mm/ns. high-speed serial lanes are picky about their picoseconds (think 300µm) and about impedance discontinuities, especially if they are more than one pair wide. if you've not done high speed circuit design before, you got a lot of reading to do